The wave maker spills his secret for sexy, tousled tresses

SPECIALTY: The not-so-glam secret behind the perfectly mussed waves seen here? "Hilary's hair hadn't been washed for a couple of days—that gave her texture," says London-based Connelly.

SECRET WEAPON: After using a wide-barrel curling iron on "different-size sections around the head," Connelly loosely twists up each still-warm section and secures it with bobby pins to set for 45 minutes.

QUICK FIX: For a "natural, lived-in" look, rough up curls using fingers "like a brush" and "avoid the urge to reach for hairspray! Hair looks better when it moves."